La differenza tra porta seriale e porta parallela

2020-08-13 14:12: 14Zongheng Intelligent Control 6

porta seriale

The serial port is also called a serial port. Compared with the transmission speed of the parallel port, the transmission speed of the serial port is relatively low. Commonly used to connect controllers, security cameras, etc. The serial port is used to link serial lines to achieve serial communication. Common serial communication methods in life, such as serial servers. Serial port data can be transparently transmitted to Ethernet devices. The serial port is usually a 9-pin D-type interface, which we usually call a DB-9 connector. A piece of data can be transferred to the other end. The DB-9 pin connector diagram is as follows.

parallel port

The parallel port can also be called a parallel port. Its transmission rate is faster than the serial port. The parallel port can move a group of 8 bits at a time on eight different lines and uses a 25-pin connector. This is why it is similar to serial communication. faster than that. The parallel port is also called the DB-25 connector. Commonly used in computers, hard drives, zip drives, CD-ROM drives, etc. Although the transfer speed is faster, all bit streams of the parallel port need to transfer data at the same speed in parallel communication. If the line is too long, it is impractical to meet this condition, so the transmission line should not be too long. The DB-25 pin connector diagram is shown below.

Comparison table of the differences between serial port and parallel port